在javascript中验证_未分类的问答_编程通用

在我的文本框，我需要输入唯一的字符串，而不是数字，我怎么能在javascript验证

回答

评论会员：srinivasvadepally 时间：2012/02/07

喜普里亚，

{A}]:Jitendra Parida1987

评论会员：游客时间：2012/02/07

嗨，尝试这个Java脚本代码:codeprelang="HTML"spanclass="code-keyword"</spanspanclass="code-leadattribute"script/spanspanclass="code-attribute"type/spanspanclass="code-keyword"="/spanspanclass="code-keyword"text/javascript"/spanspanclass="code-keyword">/spanspanclass="code-keyword"function/spanalpha(e){ vark;document.all?k=e.keyCode:k=e.which;spanclass="code-keyword"return/span((k>spanclass="code-digit"64/span&&k<spanclass="code-digit"91/span)||(k>spanclass="code-digit"96/span&&k<spanclass="code-digit"123/span)||k==spanclass="code-digit"8/span||k==32||k==13); }spanclass="code-keyword"<//spanspanclass="code-leadattribute"script/spanspanclass="code-keyword">/span/pre/codecodeprelang="HTML"spanclass="code-keyword"</spanspanclass="code-leadattribute"asp:textbox/spanspanclass="code-attribute"id/spanspanclass="code-keyword"="/spanspanclass="code-keyword"txtpartyhallname"/spanspanclass="code-attribute"runat/spanspanclass="code-keyword"="/spanspanclass="code-keyword"server"/spanspanclass="code-attribute"width/spanspanclass="code-keyword"="/spanspanclass="code-keyword"200px"/spanspanclass="code-attribute"cssclass/spanspanclass="code-keyword"="/spanspanclass="code-keyword"WaterMarkedTextBox"/spanspanclass="code-attribute"onkeydown/spanspanclass="code-keyword"="/spanspanclass="code-keyword"returnalpha(event)"/spanspanclass="code-attribute"xmlns:asp/spanspanclass="code-keyword"="/spanspanclass="code-keyword"#unknown"/spanspanclass="code-keyword">/spanspanclass="code-keyword"</spanspanclass="code-keyword"//spanspanclass="code-leadattribute"asp:textbox/spanspanclass="code-keyword">/span/pre/code
维文Dhinakaran:你刚才运行下面的代码，并学习

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<title>

Registration Form

</title>

<script type="text/javascript">

function check()

{

var ck_username = /^[A-Za-z]{3,20}$/;

d=document.form;

if (document.form.username.value.search(ck_username)==-1)

{

alert("Please only enter 6 to 12 alphabets");d.username.value='';d.username.focus();return false

}

else

{

alert("username validated OK.");d.username.value='';d.username.focus();return false}

}

</script>

</head>

<body>

<form style='margin-left:340px' name='form' action=" " method="POST" onsubmit="return check()">

<INPUT maxLength="12" type="text" name="username" size="12">

<INPUT TYPE="SUBMIT" value="Submit Username">

<INPUT TYPE="RESET" value="reset">

</form>

    </body>

</html>

的

评论会员：NikulDarji 时间：2012/02/07

{A2的}

检查这个环节......）